Metal-shearing device



Sept. 18, lgz3'.4 1,468,228- v B. DOBAZENECKI METAL SHEARING DEVICE Filed sept. 25. 1920 2 shets-sheet 2 "Minh .Patentes sept. is, i923;

` out thev use of loose and separable parts.

-My device is further a means whereby" ,ing indicatedin dottedl linesf* l nairis,- Se' Y il* ivintrniifsnneniiiefnnvfori 'nppiicationinei septemberas, 19720. -seria'i No. 412,84.

1oaZZ 'whom it may concern L" full, clean,l and exact 'speciieat'ion.V

My invention relates to metal shearing' devices and refers particularly todevicesv suitable forV the shearing of various sizes of cuttings in metal sheets. 'f

In the cutting of metal sheets it is 'frel quently desirable tomakeopenings offvarious sizes. 4

This is usually accomplished by havinga number of machinesfeach capable o f cutting v a particular size 'openingl which requires a considerable invested expenseV for machines and space; or by having Va number of replaceable cutting members xable within one machine, which requires. the investment incident to" suoli numerous cutting members and'Y 'in'-v A volves the danger of their loss orn'iisplace` ment.

of the cuttingY of various size openings 'withlboth straight edges-and openings maybecut withequal facility;Y

My device further" presentsy a means whereby metall .sheets may be punched by of the punching means" Y The base 10v andthe upper member 30 fare pivotally'comiected at 39.

the simple insertion into my device. y

The simplicity,'effectiveness and utility of my device are evident upon a. considera-- tion of the accompanying drawings, speci cation and`V claims.

-In the accompanying drawingsillustrat-A ingv one form of my :device Asimilar parts are vdesignated by similar numerals.VV K Figure 1 is a top plan view of oneform of my device. i Y Figure 2 is an elevation of 'Figurefv 1 partly in section, n the upper member in a revolved Figure 3 is aV section through 3 3 of Figure 2. Y

Figure 4 is a section 4 4 of Figure '2., c c Y,

Figure 5 is a section/through the line 5 5 of Figure 2. y

the ynecessity of vconsiderable floorj All of these difficulties*are overcome by the device of my invention which allo-wsv Vries, the upwardlyk extended lknife edge 40, andthe corresponding endY portion of the a broken View of POSlOIl'bs'ff c 1 .Y t K' 46 at 47, the latter being -pivotally attached theline through 'the-11ne- K ignr`e-6 is.A a section through theeline'.v

y The particular formfofmydevioe `shown l in the accompanying drawings@ comprises a-base member 10 having the two extended spaced` arms 11, 11.V Aytransverse member l-is slidablealong openings V13A-13` of the Varms 1111. i Tliebearing4carriesthe revoluble threaded bar -15,wh'ich is further supported by the bearing 16, rand carries the bevel 17,1 .whichV meshes with theA bevel "18 Y' bevel 21lofv the threaded revolublefbar Y22 supported bythe bearings 23 and 24. The

l carried by-the'revoluble shaft y19, whichin;

turn carries' the 4bevel 20, meshingwith the: 'v

extremity'fof theY bar 15 carries the handle*Y 25 for ease ofoperation. The bar 15 meshes with the threaded hole 26 ofV one side,` of

thef'member 12aind the bar v22meshes'with the threaded hole 27V ofthe'other sideof the memberr 12. handle-25 therefore Vwill move the-memberV 12 backwardly and forwardly. v`The-:arms 11 1'1l'ca'rry' two upwardly extended fixed'- lrnife ledges V2328,- andtheslidable member 12'fcarries an kupwardly extendedfixed The revolution of the y knife edge .29, the knife V29 being slida'ble the upper member :30 is'Y a lbox member 31,. 'i-y havin@ downwardly extendedY knife edges i 32 32 aiid"`33. A; threaded .revolubl'e shaft 34,V carried by the Lbearings; 36, meshes v M with thethreadepd hole 37. of the box 31,

and'carries a'v handle38, the Y'revolution of which 'slides fthe box r31 and thefknives x32 Y' 32" and 33 forwardlyV and-backwardly.

The other'end portion of the baseV 10 car-Y provided by the link systemszcomprisingr,

the link 44 pivotally attached to the upper` member30 at 45 yand to the foot member to'thezbasesupport 48 at; 49.1`

VThe operation of the device is asiellows z-p n l 1 l. fl/Vhen it is desired to cuta straight lineV ther upper member 30 ,isfplaced in theposi.- Y tion indicatedby the dotted line of, Figure i maar ieg? imomsLnwroBiizENEoxI, lor nosLYiv, ,Yonxl 1 fi 2Q Y. y Y 'y 1,468,228

2, the metal insertedbetween the knives et), and 41 and the knives brought together either by means ot the handle 42 or the footpower mechanism. n I

When it is desired to cut out a rectangular piece., the upper member 30 is placed in the position shown in `Figure 2, the bo'X 31 andv YVthe member l2 are placed in the desired sheetstlie finale punch `50is screwed into a. threaded hole in the box 3l, and a block 5.1i is placed within the opening between the arms 1l 1l of the base l0, the YY1:flock 51 carryingv a `female member' corresponding f to the" male punch 50, the downwardmovef ment of the upper member iorcinfiiy the male punch into the female member. device is indicated in dot and dash lines in the drawings; f

i do not limit myself to the particular size, number` shape or arrangement ot parts as shown and described, all of which may be,l varied without going beyond the seope'of my invention as shown, described and claimed.v

l. ln ar shearing device, in combination, a base, two parallel spaced knives extending longitudinally on said base and carried thereby, a 'transverse member slidably mounted on said basebetwieen said. parallel spaced knives, a knife carried by Asaid trans-.

verse member, an upper member -pivotallyj mounted on saidbase, a boit member slidably mounted in one end of said uppermember,

parallel spaced knives extending downward? ly from said bor; member, a transverse knife associated with said Vparallel knives vand extendingy downwardly. troni said box member` said box member 'and' knives carried thereby said upper member into-an operative iel'ation with respect to said base. Y

In a shearingvdevice, in combination, a base provided with spaced arms'at one end thereof, upwardlyextending;` knives carried by said arms. a transverse member" slidablyv mounted between'saidl arms, anupwardly extending` knife carried by 'said-.transverse member, means @for moving ksaid transverse member longitudinally.between said arms, an upper' member 'pivotally moi'intedon said base intermediate its ends, aber; mem-V T his Y adapted to cooperate with thev knives carried by said base upon bringing,

member and cutting knives'k ea ,Y l

longitudinally in the forward end ot' said.V

berV mounted in said Vupper member, parallel spaced cutting knives extending downwardn ly from said box member, a transverse cut-V ting knife extending downwardly from said box member and arrangedatone end there. 4of adapted to extendaeross the ends Yot said Vparallel knives, and means for swinging said upperinember into an operative posi-v tion whereby the knives on said base member cooperate with the knives on said box member carried `by the upper memb'eix Y f f 3. In a shearing' device,in combination, av

base provided'with spaced arms at one end thereof, knives *extending upwardly there# from, a transverse member'eirten'ding between said arms and knives carried thereby,y

said transverse member provided with,

Ymeans extending through longitudinally 'Vex'- tending; slots provided in said armsV i'or guiding the same longitudinally, means as- Y;

sociated with Vsaid last mentioned means fior moving saidv transverse member4 long 'itudinally between said arms, a knife carried bysaid transverse member and extending; upwardly therefronnan upper member pivotally mounted 'on Vsaid base adjacent said arms, a box] member, slidab'lyY mounted in said upper member, parallel spaced knives extending downwardly 'from said box mem-y ber, a transverse knife extending downwardly trom` 'said box member., and arrangedgadjacent ther endsofsaid parallel knives, ineans'i'ormoving said boi: vmember longitudinally in said upper member, and p means associated with saidV upper `,member for bringing said ,knives Vinto a shearing position.

4i; In a shearing device, in combination, a

basejprovided with spaced arms atlthe for-Y ward end thereof, parallel spaced knives carried by said arms and `extending up'- wardly therefrom, a f transverse lmember slidably mounted.. between said. parallelH spaced arms, an upwardly extending knife carried by said transverse member, `threaded meansfor moving said transverse member longitudinally between saidrarpms, an upper member pivotally mounted adjacent its ,ior-,

ward end on4 said base, a box member slid! ably mounted in the torivardfend of'i member, cutting knivesgcarried by said box member and extendingY downwardly gli from, threaded means Afor mo,i

upper member, and n i'eaifisy associated with said upper kmember for b i'iijiiiiiiglsaidfcut-` ting knives carried, b vsaid bonv member into a shearingrrpositionwith said first in ,Y

tioned cuttingknives.A

Signed at New York city iny the conn-ty of New Yorkand State of New York this 22nd dav of September, i920.

- is'aonisn-iw; nonasians,ein,k l

'ngi' said boit' ed thereby-Iy 

